Why do tortoiseshell coats occur primarily in female cats? O Testosterone suppresses the tortoiseshell gene in males, so tortoiseshell coats appear more often in females, who have less testosterone than males. Tortoiseshell coloring is an X-linked recessive trait, so females with two X chromosomes are more likely to express the trait than males. One of a female's two X chromosomes is randomly inactivated in each cell, so each cell may express different alleles. O The X chromosome is disabled in males, so a tortoiseshell coat, which is an X-linked recessive trait, does not occur in males.

Why do tortoiseshell coats occur primarily in female cats? O Testosterone suppresses the tortoiseshell gene in males, so tortoiseshell coats appear more often in females, who have less testosterone than males. Tortoiseshell coloring is an X-linked recessive trait, so females with two X chromosomes are more likely to express the trait than males. One of a female's two X chromosomes is randomly inactivated in each cell, so each cell may express different alleles. O The X chromosome is disabled in males, so a tortoiseshell coat, which is an X-linked recessive trait, does not occur in males.

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

See similar textbooks

Similar questions

Which findings support the fact that the presence of the Y- chromosome rather than the lack of a second X-chromosome determines the development of maleness in mammals? A transgenic mouse with two X-chromosomes and the SRY gene from the Y-chromosome develops male sex organs. A human with an XXXY genotype (Klinefelter syndrome) is phenotypically male. A human with an XO genotype (Turner syndrome) is phenotypically female. a and b, but not c a, b, and c
Cat breeders are aware that kittens expressing the X-linked calico coat pattern and tortoiseshell pattern are almost invariably females. Why are they certain of this?
The remaining questions go together. In a species of collared lizard (Crotaphytus collaris), long tail (T) is dominant to short tail (t), and green scalation (G) is dominant to brown scalation (g). Both tail length and scale color are autosomal traits. But green scalation is a x-linked"-limited trait only expressed in males – females have brown scales regardless of G/g genotype. In addition, T is a recessive lethal allele – TT homozygotes do not develop. A long-tailed brown male mates with a long-tailed brown female. Their first two viable offspring are a short-tailed green male a long-tailed brown male. What is the genotype of the father? ["", "", "", "", ""] What is the genotype of the mother? ["", "", "", "", ""] What is the genotype of the short-tailed green male? ["", "", "", "", ""] What is the genotype of the long-tailed brown male?
Explain this to me…..
please help me with this problem
number 2
4) Explain why you can NOT typically have a Male Calico cat. 5) Can you think of any unusual situation where you might be able to have a Male Calico cat? Explain how this might occur 6) Explain how X chromosome inactivation takes place in mammals at the chromosomal and molecular level. B. What genes are involved in inactivating a human X chromosome? C. What role does X chromosome-specific inactivating transcript --XIST-- non coding RNA play in the inactivation of the human X chromosome.
What is true of an X-linked gene but not of a Y-linked gene? O It does not segregate like other genes during meiosis. O It is present in both male and female offspring. O It is expressed in half of the body cells of males or females. O It is only expressed in female offspring.
To play Jeopardy, the answer is given. You must supply the question. Choose the best question for the following answer: Mutation in a second gene enhances the defects caused by a mutation in the first gene, leading to lethality. What is dominant negative? O What is suppressor? O What is recessive lethality? O What is synthetic lethal?
Color blindness in humans is an X-linked recessive trait. This means that... O a. Females are more likely to be color blind than males b. The gene associated with color blindness is found on the X chromosome, and an individual must have one (in males) or two (in females) mutant copies of the allele in order to be diagnosed as being color blind